| /* |
| * Copyright (C) 2018 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #include <android/binder_ibinder_jni.h> |
| #include "ibinder_internal.h" |
| |
| #include <android-base/logging.h> |
| #include <binder/IBinder.h> |
| |
| #include <mutex> |
| |
| #include <dlfcn.h> |
| |
| using ::android::IBinder; |
| using ::android::sp; |
| |
| struct LazyAndroidRuntime { |
| typedef sp<IBinder> (*FromJava)(JNIEnv* env, jobject obj); |
| typedef jobject (*ToJava)(JNIEnv* env, const sp<IBinder>& val); |
| |
| static FromJava ibinderForJavaObject; |
| static ToJava javaObjectForIBinder; |
| |
| static void load() { |
| std::call_once(mLoadFlag, []() { |
| void* handle = dlopen("libandroid_runtime.so", RTLD_LAZY); |
| if (handle == nullptr) { |
| LOG(WARNING) << "Could not open libandroid_runtime."; |
| return; |
| } |
| |
| ibinderForJavaObject = reinterpret_cast<FromJava>( |
| dlsym(handle, "_ZN7android20ibinderForJavaObjectEP7_JNIEnvP8_jobject")); |
| if (ibinderForJavaObject == nullptr) { |
| LOG(WARNING) << "Could not find ibinderForJavaObject."; |
| // no return |
| } |
| |
| javaObjectForIBinder = reinterpret_cast<ToJava>(dlsym( |
| handle, "_ZN7android20javaObjectForIBinderEP7_JNIEnvRKNS_2spINS_7IBinderEEE")); |
| if (javaObjectForIBinder == nullptr) { |
| LOG(WARNING) << "Could not find javaObjectForIBinder."; |
| // no return |
| } |
| }); |
| } |
| |
| private: |
| static std::once_flag mLoadFlag; |
| |
| LazyAndroidRuntime(){}; |
| }; |
| |
| LazyAndroidRuntime::FromJava LazyAndroidRuntime::ibinderForJavaObject = nullptr; |
| LazyAndroidRuntime::ToJava LazyAndroidRuntime::javaObjectForIBinder = nullptr; |
| std::once_flag LazyAndroidRuntime::mLoadFlag; |
| |
| AIBinder* AIBinder_fromJavaBinder(JNIEnv* env, jobject binder) { |
| if (binder == nullptr) { |
| return nullptr; |
| } |
| |
| LazyAndroidRuntime::load(); |
| if (LazyAndroidRuntime::ibinderForJavaObject == nullptr) { |
| return nullptr; |
| } |
| |
| sp<IBinder> ibinder = (LazyAndroidRuntime::ibinderForJavaObject)(env, binder); |
| |
| sp<AIBinder> cbinder = ABpBinder::lookupOrCreateFromBinder(ibinder); |
| AIBinder_incStrong(cbinder.get()); |
| |
| return cbinder.get(); |
| } |
| |
| jobject AIBinder_toJavaBinder(JNIEnv* env, AIBinder* binder) { |
| if (binder == nullptr) { |
| return nullptr; |
| } |
| |
| LazyAndroidRuntime::load(); |
| if (LazyAndroidRuntime::javaObjectForIBinder == nullptr) { |
| return nullptr; |
| } |
| |
| return (LazyAndroidRuntime::javaObjectForIBinder)(env, binder->getBinder()); |
| } |